Question

The speed of light in vacuum or air is _____________.

a) C = 3 x 108

m/s b) C = 3 x 108 m/s2

c) C = 2 x 108 m/s d) C = 3 x 106 m/s2​

Answer 1

Answer:

3×10^8 m/s

Explanation:

hope it helps

Answer 2

The speed of light in vacuum or air is 3 × 10⁸ m/s.

Some important points or facts about light which you need to know.

• Light shows dual nature, it is particle as well as wave.
• Speed of light is maximum in vacuum or air. and that is 299,792,458  m/s which is nearly equal to 3 × 10⁸ m/s.
• Light can travel through vacuum. it means, no medium require to travel of light.
• Light shows refraction, reflection, interference, diffraction, disperson etc..
• Ole Roemer, an eminent danish astronomer proved that light travels at a finite speed.
• Jean Facault showed that the speed of light changes in a different medium.
• photoelectric effect shows that the light is a particle while interference and diffraction show light is also a wave.